Help! Debian: no basis file system defined
 

Hello,
I had a good running Wheezy base system with 1 user and nothing to back up yet. But I did not like the partitions. So, I installed again and took another route, this time with guided LVM, no encryption. I also decided to delete the data in some partitions. Just to see what would happen. Now I have LVM VG's which are all ext4 (except for swap). The sda has:
> #1 primair 254MB B ext2
> #5 logical 250 GB K lvm
The sdb has: > #1 primair 250GB B K lvm
The sdc has: > #1 primair 250GB ext4

(I still get something which I do not like but I do not know how to change it: LVM VG <name> , LV usr 9.0 Gb device-mapper (linear)
> #1 9.0 GB K ext 4
I would like to have 29 GB. Etc. etc. The program does not give access to change in the GB)

But my main problem now is that the installation program tells me that I do not have a basis file system. I do not know what to do with that. I do not know how to get out of the graphics installation to the terminal. If I want to end the installation this program tells me that it will be unrepairable. Which could be true. So, I just keep my computer running. Everything on my computer can be deleted: no problem with that.

Can anyone help me?
with friendly greetings,
PJHAMVS

not patient enough
 

Hello,
I was not patient enough to wait for more than 67 views. I pushed the button.
I installed again.
But!
I can find NOWHERE how to make a Debian graphical installation with /home 100GB /usr 30GB /var 30GB etc.
It is too much prescribed and no way out.
So, now I installed on 1 disc all.
If someone knows how to implement above, I will install again.
with friendly greetings,
PJHAMVS